From: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Date: Wed, 8 Sep 2021 05:07:03 +0000 (-0700)
Subject: ibmvnic: check failover_pending in login response
X-Git-Tag: accepted/tizen/unified/20230118.172025~6349^2~43
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=d437f5aa23aa2b7bd07cd44b839d7546cc17166f;p=platform%2Fkernel%2Flinux-rpi.git

ibmvnic: check failover_pending in login response

If a failover occurs before a login response is received, the login
response buffer maybe undefined. Check that there was no failover
before accessing the login response buffer.

Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c
index a775c69..6aa6ff8 100644
--- a/drivers/net/ethernet/ibm/ibmvnic.c
+++ b/drivers/net/ethernet/ibm/ibmvnic.c
@@ -4700,6 +4700,14 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
 		return 0;
 	}
 
+	if (adapter->failover_pending) {
+		adapter->init_done_rc = -EAGAIN;
+		netdev_dbg(netdev, "Failover pending, ignoring login response\n");
+		complete(&adapter->init_done);
+		/* login response buffer will be released on reset */
+		return 0;
+	}
+
 	netdev->mtu = adapter->req_mtu - ETH_HLEN;
 
 	netdev_dbg(adapter->netdev, "Login Response Buffer:\n");